1. More on Basys board Wenchao Cao, Teaching Assistant Department of EECS University of Tennessee

2. Reference Manuals  Digilent BASYS Board (Xilinx Spartan 3E FPGA)  Description: http://www.digilentinc.com/Products/Detail.cfm?Prod=BASYS http://www.digilentinc.com/Products/Detail.cfm?Prod=BASYS  Download “BASYS reference manual” for references.  Read Pages 4-5 about “seven-segment display”.  Digilent BASYS 2 Board (Xilinx Spartan 3E FPGA)  Description: http://www.digilentinc.com/Products/Detail.cfm?Prod=BASYS2 http://www.digilentinc.com/Products/Detail.cfm?Prod=BASYS2  Download “BASYS 2 reference manual” for references.  Read Pages 4-5 about “seven-segment display”.

3. I/O Circuits  Digilent BASYS Board  Digilent BASYS 2 Board  Pins for display selection (anode signals) Logic 0: enable display Logic 1: disable display (Labels on boards are wrong!!) From left to right: BASYS board: BASYS2 board:  Pins for each bar of the 7-segment display (cathode signals) Logic 0: LED on Logic 1: LED off AN3AN2AN1AN0 P26P32P33P34 AN3AN2AN1AN0 K14M13J12F12

4. 7-Segment Display  7-segment display AN3 AN2 AN1 AN0 AnodeCathode  LED AnodeCathodeState Logic 1Logic 0ON Logic 0 OFF Logic 0Logic 1OFF Logic 1 OFF AN0CAAnodeCathodeState Logic 0 Logic 1Logic 0ON Logic 0Logic 1 OFF Logic 1Logic 0 OFF Logic 1 Logic 0Logic 1OFF To light up the A-bar (CA) on the rightmost (AN0) display

5. 7-Segment Display Hex digit SW3SW2SW1SW0CACBCCCDCECFCG ‘1’00011001111 ‘9’10010000100 ‘F’11110111000  Truth table InputsOutputs AN3 AN2 AN1 AN0

6. Assign Logic ‘1’ and Logic ‘0’ Quick search of the symbols Logic ‘1’: Symbol “VCC” Logic ‘0’: Symbol “GND”

7. Guide to Lab 2